A chord 21 cm long is drawn in a circle of diameter 25 cm. The perpendicular distance of the chord from the centre is:
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. √46
Applying Pythagoras theorem,
(CD)2 = (BC)2 - (DB)2
(CD)2 = (12.5)2 - (10.5)2 = 46
Thus, CD = √46